In Reply to: AC Heat nulling hum without a hum POT posted by jetrexpro on March 11, 2014 at 17:34:51:
The impedance of the CT filament secondary of the transformer would vary with frequency, in other words - 'cathode' impedance WRT 0V varies with frequency.
Question is does this matter?.
FWIW, it all sounds the same to me with PP 2A3.
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Follow Ups
- RE: AC Heat nulling hum without a hum POT - shane. 03/17/1400:10:23 03/17/14 (0)